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Plain Old Telephone Service (POTS)
Published in Jerry D. Gibson, The Communications Handbook, 2018
Caller-ID transmits the telephone number of the calling party over the local loop to the called party where the number is displayed on a small visual display. The number is encoded as digital data and is sent in a short burst, using phase shift keying, during the interval between the first and second ringing signal. Advanced caller-ID systems also transmit the name associated with the directory listing for the calling number. With caller-ID, it is possible to know who is calling before answering the telephone. However, some people consider their telephone number to be very private and personal and do not want it transmitted to others. This privacy issue delayed the availability of caller-ID in some states and is a good example of the importance of understanding the social impacts of the telephone.
Internet Applications
Published in Akshi Kumar, Web Technology, 2018
Internet Telephony is the service provided by the Internet that uses the Voice over Internet Protocol (VoIP) application layer protocol in the TCP/IP protocol stack to offer this service. It is the technology that is used to transmit voice over the Internet. The voice is first converted into digital data, which is then organized into small packets. These packets are stamped with the destination IP address and routed over the Internet. At the receiving end, the digital data is reconverted into voice and fed into the user’s phone. VoIP is a form of communication that allows you to make phone calls over a broadband Internet connection instead of typical analog telephone lines. Basic VoIP access usually allows you to call others who are also receiving calls over the Internet. Some VoIP services require a computer or a dedicated VoIP phone, while others allow you to use your landline phone to place VoIP calls through a special adapter. Thus, for VoIP, you need a broadband Internet connection, plus a traditional phone and an adapter; a VoIP-enabled phone; or VoIP software on your computer. VoIP examples include Xbox Voice, Windows messenger, AOL Instant Messenger, Motorola Phone Adapter (Vonage), Cisco Phone, and Skype (Figure 2.5).
From Automation to Interaction Design
Published in Guy A. Boy, The Handbook of Human-Machine Interaction, 2017
Why interaction design has become so important? The primary reason is that software is embedded in many systems and tools. We do not use the tools in a physical manner anymore; we interact with them. Most mobile phones are computers that enable us to communicate via various resources including telephony, email, and the Internet. They enable us to store large quantity of data including text, music, photos and movies, which can be sent to other mobile phones or computers connected to a network. Human and machine agents interact between each other either directly or via other human and/or machine agents. A machine agent such as a modern mobile phone is a software-intensive system.
Design and implementation of a VoIP PBX integrated Vietnamese virtual assistant: a case study
Published in Journal of Information and Telecommunication, 2023
Hai Son Hoang, Anh Khoa Tran, Thanh Phong Doan, Huu Khoa Tran, Ngoc Minh Duc Dang, Hoang Nam Nguyen
Voice-over-Internet Protocol (VoIP) comprises a set of software and hardware technologies for making voice calls that use a data network instead of a traditional Public Switched Telephone Network (PSTN) system. VoIP is widely used in corporate environments, and the adoption of this technology by businesses is expected to continue growing in the coming years (Packer & Reuschel, 2018). The main reason for the popularity of this model is cost saving. Both large and small companies acknowledge that deploying and managing separate data and voice networks is expensive. In contrast, converged voice and data networks enable unified communications services while reducing costs. Furthermore, the costs associated with traditional phone calls are usually higher than those associated with VoIP calls (Karapantazis & Pavlidou, 2009).